It works because we have a very modest house with an equally modest mortgage. We own the car, my wife runs a very tight budget and we don't have many other outgoings. Our largest expense (greater than the mortgage payments) are school fees; we send our 4 kids to a Montessori school but we're happy to pay the money because we can afford it (just) and it's something we both strongly believe in
The downside to the extra time I have, is that I haven't exactly used it wisely - in fact I've mostly squandered it, which makes me sad looking back at the year gone by.